Responder ⚙️

Responder (Python) is a great tool for LLMNR, NBTNS, MDNS poisoning and WPAD spoofing but it can also be used in "analyze" modes.

• BROWSER mode: inspect Browse Service messages and map IP addresses with NetBIOS names
• LANMAN mode: passively map domain controllers, servers and workstations joined to a domain with the Browser protocol (see Responder 2.0 - Owning Windows Networks part 3 by Trustwave).
• LLMNR, NBTNS, MDNS modes: inspect broadcast and multicast name resolution requests

The following command will enable the analyze modes and will give interesting information like

• Domain Controller, SQL servers, workstations
• Fully Qualified Domain Name (FQDN)
• Windows versions in used
• The "enabled" or "disabled" state of protocols like LLMNR, NBTNS, MDNS, LANMAN, BROWSER

responder --interface "eth0" --analyze
responder -I "eth0" -A